AS6001 / AS6002. FM Stereo Transmitter. Accel Semiconductor FEATURES GENERAL DESCRIPTION ORDERING INFORMATION APPLICATION
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1 AS6001 / AS6002 FEATURES Highly integrated FM stereo transmitter Patent-pending architecture Low power operation, extremely suitable for portable devices Ultra low standby current in 10uA with PDN enable LDO embedded for easy power supply design 3-wire digital control interface for flexible channel programming and control (AS6001) 4-wire parallel control interface for easy channel programming and control (AS6002) MHz with 0.1MHz step PLL-based continuous tuning for China, Europe and North America (AS6001) MHz and MHz with 0.2MHz step PLL-based continuous tuning (AS6002) Less off chip components Small footprint SSOP-20 and QFN-20 package MP3 Player Cellular Handsets Wireless Microphone Personal Media Player Personal Computer Game Machine Car Audio APPLICATION FM Stereo Transmitter GENERAL DESCRIPTION The AS6001/AS6002 is an innovative highly integrated FM stereo transmitter. It is the first generation of FM transmitter IC designed using Accel s patent-pending RF technology. It consists of a stereo encoder and FM transmitter. The stereo encoder is based on signal processing to encode analog stereo audio input signal and generate a composite FM signal with MAIN, SUB and pilot signal from a 7.6MHz oscillator. The FM transmitter uses direct frequency synthesis to radiate FM wave to the air by modulating the carrier signal with the composite signal. The AS6001/AS6002 is designed for portable application as well as general application. The 1.8V operation voltage and as low as 18mA quiescent current make it extremely suitable for portable devices such as MP3 and mobile phone. It also embeds LDO power regulator to make power supply design easy and flexible. The AS6001 has a 3-wire digital control interface for external controller easy and flexible to program and control the transmitting channel. The transmitting channel is from 87 to 108 MHz with 0.1MHz step continuous tuning. So it is suitable for China, Europe and North America. ORDERING INFORMATION PART AS6001BCS AS6001BCQ AS6002BCS AS6002BCQ PACKAGE-PIN SSOP-20 QFN-20 SSOP-20 QFN-20 Page 1 of 12 August 2006
2 ABSOLUTE MAXIMUM RATINGS (T=25 ) Parameter Symbol Limits Unit Conditions supply voltage Vddh 5 V 1 Data input voltage V in-d -0.3~Vddh+0.3 V 2 VPLL output voltage V OUT-P -0.3~Vddh+0.3 V 3 Power dissipation Pd 200 mw Storage temperature Tstg -55~+125 o C Table 1 Absolute Maximum Ratings 1. Pin5 of AS6001BCS and AS6002BCS and Pin8 of AS6001BCQ and AS6002BCQ. 2. Pin 14, 15, 16, 17 of AS6001BCS and Pin 17, 18, 19, 20 of AS6001BCQ, Pin14, 15, 16, 17, 18 of AS6002BCS and Pin 3, 17, 18, 19, 20 of AS6002BCQ. 3. Pin 7 of AS6001BCS and AS6002BCS, Pin10 of AS6001BCQ and AS6002BCQ. RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min Typ Max Unit Conditions Operating supply Vddh V 1 voltage Operating temperature Topr o C Audio input level Vin_A dbv 2 Audio input frequency Fin_A 20-15K Hz 2 band Transmission frequency Frx 87M - 108M Hz 3 Control terminal H level input voltage V IH 0.8Vddh - Vddh V 4 Control terminal L level input voltage V IL GND - 0.2Vddh V 4 Table 2 Recommended operating conditions 1. Pin5 of AS6001BCS and AS6002BCS and Pin8 of AS6001BCQ and AS6002BCQ. 2. Pin2, 19 of AS6001BCS and AS6002BCS, Pin1, 5 of AS6001BCQ and AS6002BCQ. 3. Pin9 of AS6001BCS and AS6002BCS, Pin11 of AS6001BCQ and AS6002BCQ. 4. Pin 14, 15, 16, 17 of AS6001BCS and Pin 17, 18, 19, 20 of AS6001BCQ, Pin14, 15, 16, 17, 18 of AS6002BCS and Pin 3, 17, 18, 19, 20 of AS6002BCQ. Page 2 of 12 August 2006
3 Accel FUNCTION BLOCK DIAGRAM & PIN ASSIGNMENT XO SEL EN CLK DATA XI RST XO SEL EN CLK DATA NC PDN RST CONTROLLER OSC PDN 2 14 XI LPF MPX REF NC 3 13 MOD_OUT LPF LPF VSSD 4 12 LC_OUT LDO PLL VCO 5 11 RF_OUT VSSD VDDD RF_VDD Figure 1 AS6001 Block Diagram and Pin Assignment of SSOP-20 RF_VSS VPLL MOD_OUT RF_OUT LC_OUT VDDD RF_VDD Figure 2 AS6001 Pin Assignment of QFN-20 RF_VSS VPLL PIN DESCRIPTION SSOP-20 QFN PIN Name I/O PIN Description PIN Number PIN Number 1 4 VSSD P Power ground for IC 2 5 I Right channel input 3 6 VDDD P Power supply for digital 4 7 RF_VDD P Power supply for RF 5 8 P Power supply for IC 6 9 RF_VSS G Power ground for RF 7 10 VPLL O PLL charge pump output 8 13 MOD_OUT I/O Modulation signal output 9 11 RF_OUT O RF signal output LC_OUT O VCO off chip tank connection XI I Crystal in RST I Reset input signal XO I Crystal out SEL I Pre-emphasis time constant selection signal EN I 3-wire enable input CLK I 3-wire clock input DATA I 3-wire data input 18 3 NC N No connect 19 1 I Left channel input 20 2 PDN I IC power down Table 3 AS6001 Pin description of SSOP-20 and QFN-20 Page 3 of 12 August 2006
4 Accel FUNCTION BLOCK DIAGRAM & PIN ASSIGNMENT SEL D0 D1 D2 XO XI RST XO SEL D0 D1 D2 D3 PDN RST CONTROLLER OSC PDN 2 14 XI LPF MPX REF D MOD_OUT LPF LPF VSSD 4 12 LC_OUT LDO PLL VCO 5 11 RF_OUT VSSD VDDD RF_VDD Figure 3 AS6002 Block Diagram and Pin Assignment of SSOP-20 RF_VSS VPLL MOD_OUT RF_OUT LC_OUT VDDD RF_VDD RF_VSS Figure 4 AS6002 Pin Assignment of QFN-20 VPLL PIN DESCRIPTION SSOP-20 QFN PIN Name I/O PIN Description PIN Number PIN Number 1 4 VSSD P Power ground for IC 2 5 I Right channel input 3 6 VDDD P Power supply for digital 4 7 RF_VDD P Power supply for RF 5 8 P Power supply for IC 6 9 RF_VSS G Power ground for RF 7 10 VPLL O PLL charge pump output 8 13 MOD_OUT I/O Modulation signal output 9 11 RF_OUT O RF signal output LC_OUT O VCO off chip tank connection XI I Crystal in RST I Reset input signal XO I Crystal out SEL I Pre-emphasis time constant selection signal D0 I PLL frequency selection input D1 I PLL frequency selection input D2 I PLL frequency selection input 18 3 D3 I PLL frequency selection input 19 1 I Left channel input 20 2 PDN I IC power down Table 4 AS6002 Pin description of SSOP-20 and QFN-20 Page 4 of 12 August 2006
5 ELECTRICAL CHARACTERISTIC (T=25 O C =2.7V) Parameter Symbol Min Typ Max Unit Conditions Quiescent current I Q ma Standby current I Stby - 10 ua PDN= 1 Total harmonic THD % Vin=-20dBV distortion L+R Freq=400Hz Channel balance C.B db Vin=-20dBV L+R Freq=400Hz Channel separation Sep db Vin=-20dBV L+R Freq=400Hz Input voltage amplitude -20 dbv and limit Input output gain Gv db Vin=-20dBV L+R Freq=400Hz Pilot modulation rate Mp % Vin=-20dBV L+R, Freq=400Hz Sub carrier rejection SCR db Vin=-20dBV ratio L+R Freq=400Hz Pre-emphasis time T pre 50/ us Vin=-20dBV constant 75 L+R Freq=400Hz LPF cut off frequency f c(lpf) 20K Hz and Transmission output Vtx dbuv Frx=108MHz level RF_OUT, 75Ω loading H level input current I IH ua L level input current I IL ua Positive power supply Vddd V On chip regulated Positive RF power supply Vdd_RF V On chip regulated Table 5 Electrical characteristic Page 5 of 12 August 2006
6 OPREATION 3-wire Interface (AS6001) T>100nS T T T EN CLK DATA D0 D1 D2 D3 internal data DA D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 MO PD0 PD1 T0 T1 NO Figure 5 3-wire Interface Timing Diagram No. Control unit/data Contents (1) PROGRAM COUNTER D0~D10 It is the data which sets the program counter number of dividing. This data can set a transmission frequency. It s a binary value. It sets D10 with MSB and D0 with LSB Example: In case of 99.7MHz oscillation 99.7MHz/100KHz(freq)=997 3E5(HEX) Valid values are between 366(HEX) to 438(HEX) D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 LSB MSB (2) MONO It changes stereo and mono operation 1: stereo operation 0: mono operation (L+R) (3) PD0,PD1 It controls the charge pump output voltage PD0 PD1 charge pump output 0 0 usual operation 0 1 force low 1 0 force high 1 1 high impedance (4) T0,T1 T0 and T1 are for test always set T0 1 always set T1 0 Table 6 Explanation of Serial Data * *Notes: There is no default value of serial data. Page 6 of 12 August 2006
7 4-wire Parallel Interface (AS6002) control data Frequency D0 D1 D2 D3 L L L L 87.7MHz H L L L 87.9MHz L H L L 88.1MHz H H L L 88.3MHz L L H L 88.5MHz H L H L 88.7MHz L H H L 88.9MHz H H H L PLL stops. VPLL terminal supports high impedance L L L H 106.7MHz H L L H 106.9MHz L H L H 107.1MHz H H L H 107.3MHz L L H H 107.5MHz H L H H 107.7MHz L H H H 107.9MHz H H H H PLL stops. VPLL terminal supports high impedance Table 7 Explanation of Parallel Data SEL Pin The SEL pin is pre-emphasis time constant selection. L: 50uS H: 75uS RST Pin The RST pin is IC reset input. L: reset disable H: reset enable PDN Pin The PDN pin controls the IC power on or off. L: power on H: power off Page 7 of 12 August 2006
8 APPLICATION CIRCUITS Page 8 of 12 August 2006 Option VSSD VDDD RF_VDD RF_VSS VPLL MOD_OUT RF_OUT LC_OUT PDN NC DATA CLK EN SEL XO RST XI CON Y1 7.6MHz C17 27pF C18 27pF C6 C7 AGND C3 10uF C2 C1 R1 1.9K R2 1.9K R4 10K C8 0.47uF C13 1nF C10 10uF C9 0.47uF C11 33pF C12 47pF L1 D1 100nH KV1471E R5 10K C5 C15 R6 15K R7 2.7K R3 10K L2 47uH BPF AGND C19 Figure 6 AS6001 Application Circuit Option VSSD VDDD RF_VDD RF_VSS VPLL MOD_OUT RF_OUT LC_OUT PDN D3 D2 D1 D0 SEL XO RST XI Y1 7.6MHz C17 27pF C18 27pF C6 C7 AGND C3 10uF C2 C1 R1 1.9K R2 1.9K R4 10K C8 0.47uF C13 1nF C10 10uF C9 0.47uF C11 33pF C12 47pF L1 D1 100nH KV1471E R5 10K C5 C15 R6 15K R7 2.7K R3 10K L2 47uH BPF AGND C19 R10 100K*6 S3 Figure 7 AS6002 Application Circuit
9 PACKAGE DIMENSIONS SSOP-20 DIM. Millmeter MIN. TYP MAX. A A A b c D E E e 0.65BSC L θ 0º - 8º Page 9 of 12 August 2006
10 QFN20 (4x4mm) DIM. mm. MIN. TYP MAX. A A A A b D D E E e L ddd 0.08 Page 10 of 12 August 2006
11 CONTACT INFORMATION Accel Corp. 1F, Main Building, 149 Chun Xiao Road Shanghai, P.R. China Tel: +86 (21) Fax: +86 (21) Zip: Internet: Page 11 of 12 August 2006
12 DOCUMENT STATUS The status of this datasheet is preliminary information. All values specified in this datasheet are the target values of the design of Accel Corp. in development. All detailed specifications including pinouts and electrical specifications are subjects to be changed by Accel Corp. without notice. TRADEMARKS, PATENTS AND LICENSES Accel, ASC are trademarks of Accel Corp. Page 12 of 12 August 2006
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